Teething, Biting, and Breastfeeding: What’s Normal and How to Handle It

There are few breastfeeding moments more startling than being bitten by your baby.

One second you’re having a normal feed, and the next—ouch.

For many parents, biting during breastfeeding feels sudden, confusing, and honestly a little emotional. It can make you tense during feeds or even start to dread nursing sessions altogether. And if your baby has recently started teething, it’s easy to assume teeth are entirely to blame.

But here’s the thing: biting during breastfeeding is usually more developmental than dental.

Teething can contribute, but it’s often only one piece of a much bigger picture.

The good news? In most cases, biting is temporary, manageable, and not a sign that breastfeeding needs to end.

Is Biting During Breastfeeding Normal?

Surprisingly, yes.

Many breastfed babies go through a phase of biting, clamping, chewing, or experimenting with their latch—especially as they become more aware of their environment and more interested in cause-and-effect interactions.

Babies are constantly learning:

• What happens when I do this?

• What reaction do I get?

• Can I make mom laugh? Jump? Talk?

As babies grow older, feeding also becomes less reflexive and more social and sensory. A younger newborn typically feeds with intense focus and strong feeding reflexes. An older baby? They may nurse for a few minutes, pop off to look around, smile at the dog, then come back for another sip.

That developmental shift matters.

Biting often shows up during periods of:

• Increased distraction

• Developmental leaps

• Teething discomfort

• Changes in milk flow

• Curiosity and attention-seeking

• Fatigue or overstimulation

And importantly: babies generally cannot bite effectively while actively nursing with a deep latch. During efficient milk transfer, the tongue remains extended over the lower gumline, helping protect the nipple. Biting tends to happen when feeding is slowing down, the latch becomes shallow, or baby is no longer actively transferring milk.¹

Teething vs. Developmental Biting

Parents often ask:“Are they biting because they’re teething?”

Sometimes—but not always.

Teething can absolutely make babies want more pressure on their gums. Some babies may clamp briefly or experiment with chewing sensations while nursing.

Signs teething may be contributing include:

• Increased drooling

• Gum swelling or tenderness

• Chewing on toys, hands, or clothing

• Fussiness unrelated to feeds

• Wanting to bite on everything, not just the breast

  
  

But if biting only happens during certain moments in a feed, there may be another explanation.

For example:

• Biting at the end of feeds often happens when baby is done nursing but hasn’t unlatch yet.

• Biting during slower flow periods may reflect frustration or impatience.

• Sudden distracted biting can happen when babies are overstimulated or trying to engage with their environment.

Looking at patterns is often more helpful than focusing on teeth alone.

Why Babies Bite During Breastfeeding

1. They’re Finished Feeding

This is probably one of the most common reasons.

Many babies bite near the end of a session when active sucking slows and they begin playing with the latch instead of feeding effectively.

Often, parents can identify subtle signs just before the bite:

• Slower sucking

• More head turning

• Tension changes

• Smiling or looking around

• Loss of deep rhythmic swallowing

Learning those “I’m done” cues can help prevent many bites before they happen.

2. Milk Flow Changes

Some babies bite when milk flow slows and they become frustrated.

This may happen:

• Later in the feeding

• During periods of supply regulation

• During hormonal changes

• With distracted older babies who want faster flow

In some cases, frequent biting paired with frustration, shortened feeds, or nursing refusal may warrant a closer look at milk transfer or feeding dynamics.

3. They Want a Reaction

Babies are tiny scientists.

If biting gets a dramatic response—jumping, yelling, laughing, talking excitedly—they may repeat it simply because it produced a big social interaction.

That does not mean babies are manipulative or intentionally trying to hurt you. It just means they learn quickly from cause and effect.

4. They’re Distracted

Older babies are busy.

As babies become more socially and developmentally aware, many feeds become shorter, more distracted, and less focused. Some babies clamp down when they hear noise, turn suddenly, or try to look around while still latched.

A shallow, distracted latch can increase the likelihood of biting.

How to Respond When Baby Bites

In the moment, the goal is simple:Stay calm, protect the latch, and avoid turning biting into a game.

That’s easier said than done when someone unexpectedly chomps your nipple—but calm, consistent responses tend to work best.

What helps:

• Gently unlatch baby immediately

• Pause briefly before re-latching

• Keep your voice calm and neutral

• End the feeding if baby clearly seems done

What to avoid:

• Yelling or dramatic reactions

• Pulling baby suddenly off the breast

• Punitive responses

  
  

Sometimes parents hear advice to flick the cheek, tap the mouth, or firmly scold a baby after biting. Evidence-based feeding support generally favors responsive, non-punitive approaches that preserve feeding trust and attachment.²

Protecting the Latch Matters

One of the best preventative strategies is maintaining a deep, supported latch.

A baby who is actively nursing deeply is far less likely to bite effectively. Watching for shallow latch patterns, slipping, or distracted feeding behaviors can help reduce nipple trauma.

Some helpful strategies include:

• Feeding before baby becomes overly hungry or dysregulated

• Nursing in lower-distraction environments when possible

• Watching for the end of active feeding

• Supporting positioning and alignment

• Breaking suction gently if latch quality changes

  
  

If biting suddenly becomes frequent after previously comfortable feeding, it can sometimes be worth assessing for:

• Feeding aversion

• Oral tension

• Changes in milk supply

• Ear infections or illness

• Nasal congestion

• Latch changes related to teething discomfort

  
  

When to Reach Out for Support

Occasional biting is extremely common.

But if you’re experiencing:

• Ongoing nipple trauma

• Frequent painful clamping

• Sudden feeding refusal

• Major latch changes

• Poor weight gain

• Increased frustration at the breast

• Anxiety around feeding

…it may help to work with an International Board Certified Lactation Consultant (IBCLC) to look at the bigger picture.

Sometimes the issue is truly just a passing developmental phase.

Other times, biting is the symptom of something else affecting feeding.

The Bottom Line

Biting during breastfeeding can feel discouraging—but in most cases, it’s temporary and manageable.

Your baby is not trying to hurt you.You are not failing.And biting does not automatically mean breastfeeding has to end.

Most babies move through this phase with time, consistency, and a little support.

And often, understanding why the biting is happening makes it feel far less overwhelming.

References

1. Riordan J, Wambach K. Breastfeeding and Human Lactation. 6th ed. Jones & Bartlett Learning; 2022.

2. American Academy of Pediatrics. Breastfeeding Handbook for Physicians. 3rd ed. American Academy of Pediatrics; 2023.

3. Mohrbacher N. Breastfeeding Answers Made Simple. Hale Publishing; 2020.

4. Walker M. Breastfeeding Management for the Clinician: Using the Evidence. 5th ed. Jones & Bartlett Learning; 2021.